The garage ball organizer project is a perfect starter project for anyone. It's simple and requires only basic hand tools. For the more advanced woodworker, it's a great project to get rid of those scrap pieces of wood that you have laying around the shop. It can be made from any type of wood: hard, soft, plywood, MDF, etc.. For my project, I used some of the scrap plywood I had laying around that I never know what to do with. Of course, I'm a huge pack rat, so I can't throw anything away. The only items that I needed to purchase were the two bungie cords that hold all of the balls in place. I'm sure that you could get a better deal at Harbor Frieght or similiar stores.
Another great point about this project is that they are easily stacked together, either side to side or top to bottom. Also, it's very easy to mount the garage ball organizers to the wall. Simple drill a couple of holes in the back brace and screw them to a stud. The design is such that you can mount them side by side on adjacent studs placed 16" on center.